24595346d7
While shuffling some code around, dsa_switch_setup_one() was introduced,
and it was modified to return either an error code using ERR_PTR() or a
NULL pointer when running out of memory or failing to setup a switch.
This is a problem for its caler: dsa_switch_setup() which uses IS_ERR()
and expects to find an error code, not a NULL pointer, so we still try
to proceed with dsa_switch_setup() and operate on invalid memory
addresses. This can be easily reproduced by having e.g: the bcm_sf2
driver built-in, but having no such switch, such that drv->setup will
fail.
Fix this by using PTR_ERR() consistently which is both more informative
and avoids for the caller to use IS_ERR_OR_NULL().
Fixes:
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|---|---|---|
| .. | ||
| dsa_priv.h | ||
| dsa.c | ||
| Kconfig | ||
| Makefile | ||
| slave.c | ||
| tag_brcm.c | ||
| tag_dsa.c | ||
| tag_edsa.c | ||
| tag_trailer.c | ||